3 papers
hep-th2026
Semi-classical Imprint of Horizon Induced Instability
Arnab Chakraborty, Onirban Islam, Arshad Momen
We consider an inverted harmonic oscillator in the space of square-integrable functions on the circle and compute its density of states employing…
math.DG2026
A Lorentzian Equivariant Index Theorem
Onirban Islam, Lennart Ronge
We develop a formula for the equivariant index of a twisted Dirac operator on a compact globally hyperbolic spacetime with timelike boundary on which a group acts isometrically, su…
math-ph2020
Relative entanglement entropy of thermal states of Klein-Gordon and Dirac quantum field theories
Onirban Islam
An upper bound of the relative entanglement entropy of thermal states at an inverse temperature of linear, massive Klein-Gordon and Dirac quantum field theories across two regi…